363 lines
12 KiB
Python
363 lines
12 KiB
Python
import subprocess
|
||
from pathlib import Path
|
||
import sys
|
||
import logging
|
||
from datetime import datetime
|
||
from time import time
|
||
from rich.logging import RichHandler
|
||
from rich.progress import Progress
|
||
from pickle import dumps, loads
|
||
import atexit
|
||
|
||
root = None
|
||
TRAIN = False
|
||
ESTI_FILE = Path("esti.out")
|
||
CFG_FILE = Path("config.json")
|
||
CFG = {
|
||
"crf":"18",
|
||
"codec": "h264",
|
||
"extra": [],
|
||
"ffmpeg": "ffmpeg",
|
||
"manual": None,
|
||
"video_ext": [".mp4", ".mkv"],
|
||
"train": False
|
||
|
||
}
|
||
esti=None # :tuple[list[int],list[float]]
|
||
|
||
def get_cmd(video_path,output_file):
|
||
if CFG["manual"] is not None:
|
||
command=[
|
||
CFG["ffmpeg"],
|
||
"-hide_banner",
|
||
"-i", video_path
|
||
]
|
||
command.extend(CFG["manual"])
|
||
command.append(output_file)
|
||
|
||
command = [
|
||
CFG["ffmpeg"],
|
||
"-hide_banner", # 隐藏 ffmpeg 的横幅信息
|
||
"-i", video_path,
|
||
"-vf", "scale=-1:1080", # 设置视频高度为 1080，宽度按比例自动计算
|
||
"-c:v", CFG["codec"], # 使用 Intel Quick Sync Video 编码
|
||
"-global_quality", CFG["crf"], # 设置全局质量（数值越低质量越高）
|
||
"-r","30",
|
||
"-preset", "slow", # 设置压缩速度为慢（压缩效果较好）
|
||
"-y",
|
||
]
|
||
command.extend(CFG["extra"])
|
||
command.append(output_file)
|
||
return command
|
||
|
||
def train_init():
|
||
global esti_data,TRAIN,data_file
|
||
data_file = Path("estiminate_data.dat")
|
||
if data_file.exists():
|
||
esti_data=loads(data_file.read_bytes())
|
||
if not isinstance(esti_data,tuple):
|
||
esti_data=([],[])
|
||
else:
|
||
esti_data=([],[])
|
||
TRAIN=True
|
||
atexit.register(save_esti)
|
||
# print(esti_data)
|
||
|
||
|
||
# 配置logging
|
||
def setup_logging():
|
||
log_dir = Path("logs")
|
||
log_dir.mkdir(exist_ok=True)
|
||
log_file = log_dir / f"video_compress_{datetime.now().strftime('%Y%m%d')}.log"
|
||
stream = RichHandler(rich_tracebacks=True,tracebacks_show_locals=True)
|
||
stream.setLevel(logging.DEBUG)
|
||
stream.setFormatter(logging.Formatter("%(message)s"))
|
||
|
||
file = logging.FileHandler(log_file, encoding='utf-8')
|
||
file.setLevel(logging.INFO)
|
||
|
||
logging.basicConfig(
|
||
level=logging.DEBUG,
|
||
format='%(asctime)s - %(levelname) 7s - %(message)s',
|
||
handlers=[
|
||
file,
|
||
stream
|
||
]
|
||
)
|
||
|
||
def polyfit_manual(x, y, degree=2):
|
||
"""手动实现二次多项式最小二乘拟合"""
|
||
n = len(x)
|
||
if n != len(y):
|
||
raise ValueError("输入的x和y长度必须相同")
|
||
|
||
# 对于二次多项式 y = ax^2 + bx + c
|
||
# 构建矩阵方程 A * [a, b, c]^T = B
|
||
# 其中 A = [[sum(x^4), sum(x^3), sum(x^2)],
|
||
# [sum(x^3), sum(x^2), sum(x)],
|
||
# [sum(x^2), sum(x), n]]
|
||
# B = [sum(x^2 * y), sum(x * y), sum(y)]
|
||
|
||
# 计算需要的和
|
||
sum_x = sum(x)
|
||
sum_x2 = sum(xi**2 for xi in x)
|
||
sum_x3 = sum(xi**3 for xi in x)
|
||
sum_x4 = sum(xi**4 for xi in x)
|
||
sum_y = sum(y)
|
||
sum_xy = sum(xi*yi for xi, yi in zip(x, y))
|
||
sum_x2y = sum(xi**2*yi for xi, yi in zip(x, y))
|
||
|
||
# 构建矩阵A和向量B
|
||
A = [
|
||
[sum_x4, sum_x3, sum_x2],
|
||
[sum_x3, sum_x2, sum_x],
|
||
[sum_x2, sum_x, n]
|
||
]
|
||
B = [sum_x2y, sum_xy, sum_y]
|
||
|
||
# 使用高斯消元法解线性方程组
|
||
# 将增广矩阵 [A|B] 转换为行阶梯形式
|
||
AB = [row + [b] for row, b in zip(A, B)]
|
||
n_rows = len(AB)
|
||
|
||
# 高斯消元
|
||
for i in range(n_rows):
|
||
# 寻找当前列中最大元素所在的行
|
||
max_row = i
|
||
for j in range(i + 1, n_rows):
|
||
if abs(AB[j][i]) > abs(AB[max_row][i]):
|
||
max_row = j
|
||
|
||
# 交换行
|
||
AB[i], AB[max_row] = AB[max_row], AB[i]
|
||
|
||
# 将当前行主元归一化
|
||
pivot = AB[i][i]
|
||
if pivot == 0:
|
||
raise ValueError("矩阵奇异，无法求解")
|
||
|
||
for j in range(i, n_rows + 1):
|
||
AB[i][j] /= pivot
|
||
|
||
# 消元
|
||
for j in range(n_rows):
|
||
if j != i:
|
||
factor = AB[j][i]
|
||
for k in range(i, n_rows + 1):
|
||
AB[j][k] -= factor * AB[i][k]
|
||
|
||
# 提取结果
|
||
coeffs = [AB[i][n_rows] for i in range(n_rows)]
|
||
|
||
return coeffs # [a, b, c] 对应 ax^2 + bx + c
|
||
|
||
def save_esti():
|
||
try:
|
||
if len(esti_data[0]) > 0:
|
||
coeffs = polyfit_manual(esti_data[0], esti_data[1])
|
||
# 保存为逗号分隔的文本格式
|
||
ESTI_FILE.write_text(','.join(map(str, coeffs)))
|
||
except Exception as e:
|
||
logging.warning("保存估算数据失败", exc_info=e)
|
||
|
||
def fmt_time(t:int) -> str:
|
||
if t>3600:
|
||
return f"{t//3600}h {t//60}min {t%60}s"
|
||
elif t>60:
|
||
return f"{t//60}min {t%60}s"
|
||
else:
|
||
return f"{round(t)}s"
|
||
|
||
def func(sz:int,src=False):
|
||
if TRAIN:
|
||
try:
|
||
data_file.write_bytes(dumps(esti_data))
|
||
except KeyboardInterrupt as e:raise e
|
||
except Exception as e:
|
||
logging.warning("无法保存数据",exc_info=e)
|
||
try:
|
||
if TRAIN:
|
||
if len(esti_data[0])==0:
|
||
return -1 if src else "NaN"
|
||
coeffs = polyfit_manual(esti_data[0], esti_data[1])
|
||
t = coeffs[0]*sz**2 + coeffs[1]*sz + coeffs[2]
|
||
elif esti is not None:
|
||
t = esti[0]*sz**2 + esti[1]*sz + esti[2]
|
||
# print(t,sz)
|
||
else:
|
||
logging.warning(f"Unexpected condition at func->TRAIN")
|
||
return -1 if src else "NaN"
|
||
t = round(t)
|
||
if src:
|
||
return t
|
||
return fmt_time(t)
|
||
except KeyboardInterrupt as e:raise e
|
||
except Exception as e:
|
||
logging.warning("无法计算预计时间",exc_info=e)
|
||
return -1 if src else "NaN"
|
||
|
||
def process_video(video_path: Path):
|
||
global esti_data
|
||
use=None
|
||
sz=video_path.stat().st_size//(1024*1024)
|
||
if esti is not None or TRAIN:
|
||
use = func(sz,True)
|
||
logging.debug(f"开始处理文件: {video_path.relative_to(root)}，大小{sz}M，预计{fmt_time(use)}")
|
||
else:
|
||
logging.debug(f"开始处理文件: {video_path.relative_to(root)}，大小{sz}M")
|
||
|
||
|
||
bgn=time()
|
||
# 在视频文件所在目录下创建 compress 子目录（如果不存在）
|
||
compress_dir = video_path.parent / "compress"
|
||
compress_dir.mkdir(exist_ok=True)
|
||
|
||
# 输出文件路径：与原文件同名，保存在 compress 目录下
|
||
output_file = compress_dir / (video_path.stem + video_path.suffix)
|
||
if output_file.is_file():
|
||
logging.warning(f"文件{output_file}存在，跳过")
|
||
return use
|
||
|
||
# 4x
|
||
# command = [
|
||
# "ffmpeg.exe", # 可以修改为 ffmpeg 的完整路径，例如：C:/ffmpeg/bin/ffmpeg.exe
|
||
# "-hide_banner", # 隐藏 ffmpeg 的横幅信息
|
||
# "-i", str(video_path.absolute()),
|
||
# "-filter:v", "setpts=0.25*PTS", # 设置视频高度为 1080，宽度按比例自动计算
|
||
# "-filter:a", "atempo=4.0",
|
||
# "-c:v", "h264_qsv", # 使用 Intel Quick Sync Video 编码
|
||
# "-global_quality", "28", # 设置全局质量（数值越低质量越高）
|
||
# "-r","30",
|
||
# "-preset", "fast", # 设置压缩速度为慢（压缩效果较好）
|
||
# "-y",
|
||
# str(output_file.absolute())
|
||
# ]
|
||
|
||
# 1x
|
||
command = get_cmd(str(video_path.absolute()),output_file)
|
||
|
||
try:
|
||
# 调用 ffmpeg，并捕获标准输出和错误信息
|
||
result = subprocess.run(
|
||
command,
|
||
stdout=subprocess.PIPE,
|
||
stderr=subprocess.PIPE,
|
||
encoding="utf-8",
|
||
text=True
|
||
)
|
||
|
||
# 检查 ffmpeg 的错误输出
|
||
if result.stderr:
|
||
# 记录所有警告和错误信息
|
||
for line in result.stderr.splitlines():
|
||
if 'warning' in line.lower():
|
||
logging.warning(f"[FFmpeg]({video_path}): {line}")
|
||
elif 'error' in line.lower():
|
||
logging.error(f"[FFmpeg]({video_path}): {line}")
|
||
|
||
# 检查 ffmpeg 执行的返回码
|
||
if result.returncode != 0:
|
||
logging.error(f"处理文件 {video_path} 失败，返回码: {result.returncode}，cmd={' '.join(command)}")
|
||
logging.error(result.stdout)
|
||
logging.error(result.stderr)
|
||
else:
|
||
logging.debug(f"文件处理成功: {video_path} -> {output_file}")
|
||
|
||
end=time()
|
||
if TRAIN:
|
||
esti_data[0].append(sz)
|
||
esti_data[1].append(end-bgn)
|
||
|
||
|
||
except Exception as e:
|
||
logging.error(f"执行 ffmpeg 命令时发生异常, 文件：{video_path}，cmd={' '.join(command)}",exc_info=e)
|
||
return use
|
||
|
||
def traverse_directory(root_dir: Path):
|
||
video_extensions = set(CFG["video_ext"])
|
||
sm=None
|
||
if esti is not None:
|
||
logging.info(f"正在估算时间（当存在大量小文件时，估算值将会很离谱）")
|
||
sm = 0
|
||
for file in root_dir.rglob("*"):
|
||
if file.parent.name == "compress":continue
|
||
if file.is_file() and file.suffix.lower() in video_extensions:
|
||
sz=file.stat().st_size//(1024*1024)
|
||
tmp = func(sz,True)
|
||
if not isinstance(tmp,int):
|
||
logging.error("无法预估时间，因为预估函数返回非整数")
|
||
elif tmp == -1:
|
||
logging.error("无法预估时间，因为预估函数返回了异常")
|
||
sm += tmp
|
||
logging.info(f"预估用时：{fmt_time(sm)}")
|
||
|
||
|
||
logging.debug(f"开始遍历目录: {root_dir}")
|
||
# 定义需要处理的视频后缀（忽略大小写）
|
||
|
||
with Progress() as prog:
|
||
task = prog.add_task("压缩视频",total=sm)
|
||
# prog.print("进度条右侧时间为不精确估算（当所有文件处理时间相同时估算精确）")
|
||
# 使用 rglob 递归遍历所有文件
|
||
for file in root_dir.rglob("*"):
|
||
if file.parent.name == "compress":continue
|
||
if file.is_file() and file.suffix.lower() in video_extensions:
|
||
t = process_video(file)
|
||
# if esti is not None:
|
||
# sm-=t
|
||
# prog.update(task,advance=1,description=f"预计剩余{fmt_time(sm)}")
|
||
if t is None:
|
||
prog.advance(task)
|
||
else:
|
||
prog.advance(task,t)
|
||
|
||
if __name__ == "__main__":
|
||
setup_logging()
|
||
tot_bgn = time()
|
||
logging.info("-------------------------------")
|
||
logging.info(datetime.now().strftime('Video Compress started at %Y/%m/%d %H:%M'))
|
||
|
||
if CFG_FILE.exists():
|
||
try:
|
||
import json
|
||
cfg:dict = json.loads(CFG_FILE.read_text())
|
||
CFG.update(cfg)
|
||
except Exception as e:
|
||
logging.warning("Invalid config file, ignored.")
|
||
logging.debug(e)
|
||
|
||
# 通过命令行参数传入需要遍历的目录
|
||
if len(sys.argv) < 2:
|
||
print(f"用法：python {__file__} <目标目录>")
|
||
logging.warning("Error termination via invalid input.")
|
||
sys.exit(1)
|
||
|
||
root = Path(sys.argv[1])
|
||
if CFG["train"]:
|
||
train_init()
|
||
else:
|
||
if ESTI_FILE.exists():
|
||
try:
|
||
# 从文件读取系数
|
||
coeffs_str = ESTI_FILE.read_text().strip().split(',')
|
||
esti = [float(coeff) for coeff in coeffs_str]
|
||
except Exception as e:
|
||
logging.warning(f"预测输出文件{str(ESTI_FILE)}存在但无法读取", exc_info=e)
|
||
|
||
if not root.is_dir():
|
||
print("提供的路径不是一个有效目录。")
|
||
logging.warning("Error termination via invalid input.")
|
||
sys.exit(1)
|
||
|
||
try:
|
||
traverse_directory(root)
|
||
tot_end = time()
|
||
logging.info(f"Elapsed time: {fmt_time(tot_end-tot_bgn)}")
|
||
logging.info("Normal termination of Video Compress.")
|
||
except KeyboardInterrupt:
|
||
logging.warning("Error termination via keyboard interrupt, CHECK IF LAST PROCSSING VIDEO IS COMPLETED.")
|
||
except Exception as e:
|
||
logging.error("Error termination via unhandled error, CHECK IF LAST PROCSSING VIDEO IS COMPLETED.",exc_info=e)
|
||
|
||
|